Attachment to a Person Scale (ATPERS)

Abstract

The Attachment to a Person Scale (abbreviated as ATPERS) is a concise, three-item psychometric instrument designed to evaluate the subjective magnitude of emotional closeness, relational attachment, and psychological identification an individual experiences toward a designated focal person. Originally operationalized by Matteo De Angelis, Andrea Bonezzi, Antonio M. Peluso, Derek D. Rucker, and Michele Costabile (2012) within an experimental investigation of self-enhancement drivers in word-of-mouth generation and transmission, the instrument functions as an efficient, highly sensitive metric for assessing state or situational interpersonal attachment. Respondents evaluate the target individual on three distinct 7-point bipolar items featuring customized target insertion blanks (e.g., assessing emotional closeness, perceived attachment, and degree of personal identification). Despite its brevity, psychometric evaluations confirm that the scale demonstrates high internal consistency (typically yielding a Cronbach’s alpha exceeding .85 to .92 across experimental paradigms), robust unidimensionality, and pronounced construct validity. By capturing the core affective and cognitive dimensions of interpersonal connection, the ATPERS provides experimental psychologists, consumer behaviorists, and social researchers with a standardized tool for manipulation checks, dyadic relational assessments, and the empirical modeling of social transmission mechanisms across diverse social contexts.

Keywords

interpersonal attachment, emotional closeness, psychological identification, manipulation check, dyadic relations, word-of-mouth transmission, self-enhancement, social bonding, psychometrics, relational closeness

Authors

The Attachment to a Person Scale was developed and operationalized by an international team of researchers in marketing, consumer psychology, and behavioral economics:

• Matteo De Angelis — Professor of Marketing, Department of Business and Management, LUISS Guido Carli University, Rome, Italy. Focus areas: social influence, consumer ethics, word-of-mouth communication, and psychological drivers of social sharing.
• Andrea Bonezzi — Associate Professor of Marketing, Stern School of Business, New York University, New York, NY, USA. Focus areas: consumer judgment, decision-making, behavioral psychology, and psychological mechanisms of sharing.
• Antonio M. Peluso — Full Professor of Marketing, Department of Management and Economics, University of Salento, Lecce, Italy. Focus areas: consumer behavior, product design adoption, and social psychology.
• Derek D. Rucker — Sandy & Morton Goldman Professor of Entrepreneurial Studies in Marketing, Kellogg School of Management, Northwestern University, Evanston, IL, USA. Focus areas: social power, compensatory consumption, attitudes, persuasion, and self-enhancement.
• Michele Costabile — Full Professor of Marketing and Management, Department of Business and Management, LUISS Guido Carli University, Rome, Italy. Focus areas: relationship marketing, innovation metrics, and market strategy.

Purpose

The primary purpose of the Attachment to a Person Scale is to measure the extent to which an individual experiences an emotional bond, interpersonal affinity, and psychological alignment with a designated target individual. Developed within experimental consumer research, the instrument was engineered to address a recurring methodological necessity: establishing a psychometrically sound, low-burden manipulation check to confirm whether experimental manipulations successfully induce high versus low relational closeness toward a specific interaction partner or social target.

In behavioral and social science paradigms, researchers routinely manipulate social variables—such as whether a scenario involves an intimate friend, a loose acquaintance, or a complete stranger. Historically, studies have relied on heterogeneous, single-item questions or lengthy attachment inventories such as the Experiences in Close Relationships (ECR) scale. While comprehensive batteries like the ECR excel at measuring dispositional attachment orientations (e.g., attachment anxiety and avoidance), they are structurally unsuitable for rapid state-level manipulation checks evaluating a single, contextual interaction target. Lengthy inventories induce respondent fatigue, introduce cognitive contamination into subsequent decision tasks, and often fail to focus directly on the target individual specified by the experimental context.

The ATPERS circumvents these limitations by providing a targeted, three-item evaluation explicitly centered on a named focal person. Beyond manipulation checks, the scale serves broader research applications across social psychology, behavioral economics, and organizational communication. Researchers employ the ATPERS to model interpersonal transmission dynamics, examine how relational closeness buffers against negative social feedback, evaluate customer-salesperson dyadic bonds in service marketing, and quantify the strength of affective ties between leaders and team members. In clinical and counseling settings, the scale can serve as a rapid ad-hoc index of perceived closeness within marital, family, or therapeutic dyads, offering empirical visibility into how an individual conceptualizes their bond with a specific relational partner.

Psychological Construct

The psychological construct evaluated by the ATPERS is interpersonal attachment toward a specific person, conceptualized as a multi-faceted yet unidimensional affective-cognitive state representing relational closeness, bond strength, and identity overlap. The construct integrates three primary dimensions:

1. Emotional Closeness

Emotional closeness represents the subjective feeling of affective proximity, vulnerability, and mutual warmth between two individuals. In relational psychology, emotional closeness signifies the breakdown of psychological distance, allowing individuals to experience empathy, shared valence, and psychological safety. Item 1 (“To what extent do you feel emotionally close to [Person’s name]?”) taps directly into this affective pillar. High emotional closeness reflects a subjective state wherein the focal individual is experienced not as an emotionally neutral entity, but as a source of affective relevance, care, and reciprocal significance.

2. Felt Interpersonal Attachment

Felt attachment refers to the subjective realization of a durable relational bond. Rooted in attachment theory, this dimension captures the phenomenological experience of being tied or bonded to another person. In the context of the ATPERS, Item 2 (“To what extent do you feel attached to [Person’s name]?”) measures the strength of this bond within a targeted social dyad. Unlike general liking or sociometric popularity, attachment involves perceived dependence, relational continuity, and subjective investment in the other party’s well-being and actions.

3. Self-Other Identification (Relational Overlap)

Identification entails the incorporation of the focal individual into one’s personal cognitive schema, reflecting the concept of self-expansion and psychological inclusion. Item 3 (“To what extent do you identify with [Person’s name]?”) measures the extent to which the respondent perceives shared identity, overlapping values, or self-defining resonance with the focal target. When identification is elevated, the boundaries between the self and the other become permeable, such that the target’s achievements, failures, and behaviors have direct cognitive and motivational implications for the self.

Theoretical Framework

The ATPERS is anchored across three foundational theoretical paradigms in social and personality psychology:

1. Bowlby’s Attachment Theory

Originating from the clinical and developmental work of John Bowlby (1969, 1982) and extended to adult interpersonal relationships by Hazan and Shaver (1987), attachment theory posits that humans possess an innate behavioral system driving them to seek and maintain proximity to significant others. While classical attachment paradigms focus heavily on chronic working models (e.g., secure, anxious, avoidant styles), modern social-cognitive formulations (e.g., Mikulincer & Shaver, 2007) demonstrate that attachment states can be dynamically activated toward specific targets. The ATPERS operationalizes the state output of this attachment behavioral system, gauging how intensely the target person functions as an attachment figure or emotionally meaningful connection.

2. The Self-Expansion Model

Articulated by Arthur Aron and Elaine N. Aron (1986, 1996), the Self-Expansion Model suggests that individuals are motivated to expand their personal efficacy, resources, and identities by incorporating close others into their self-concept. As relational intimacy deepens, the cognitive representation of the “other” merges with the “self” (the Inclusion of Other in the Self [IOS] construct). The third item of the ATPERS specifically addresses this psychological mechanism: identifying with another person is the cognitive manifestation of self-other overlap, explaining why individuals celebrate or feel vicariously proud of the focal person’s accomplishments.

3. Self-Enhancement and Social Transmission Dynamics

In the empirical framework established by De Angelis et al. (2012), attachment serves as a key moderating or boundary condition governing social communication. When people feel deeply attached to and identify with an individual, that individual becomes an extension of the self. Consequently, sharing information about that person’s positive behaviors or favorable consumption experiences yields vicarious self-enhancement. Conversely, sharing the same information about an unattached acquaintance or stranger fails to produce equivalent self-enhancement gains because the cognitive architecture linking the other’s prestige to the self is absent. The ATPERS was theoretically situated to capture this precise boundary condition.

Validity

The construct, convergent, discriminant, and predictive validity of the Attachment to a Person Scale has been substantiated through rigorous experimental and empirical testing.

Construct and Manipulation Validity

In the seminal validation reported by De Angelis et al. (2012, Experiment 4 pretest), the ATPERS demonstrated strong construct validity as an experimental manipulation check. Participants were assigned to condition scenarios designed to evoke either high attachment (e.g., a very close, intimate friend) or low attachment (e.g., a distant acquaintance). The three items yielded significantly higher aggregate scores in the high-attachment condition relative to the low-attachment condition (mean differences exhibiting high statistical significance, typically t > 8.0, p < .001, with substantial effect sizes exceeding Cohen’s d = 1.20). This sharp divergence confirms that the instrument effectively distinguishes between varying gradations of relational bonding.

Convergent Validity

Convergent validity is evidenced by the scale’s alignment with established relational closeness metrics. Across subsequent replications and related dyadic paradigms, the composite ATPERS index correlates robustly (r values typically ranging between .72 and .84, p < .001) with the single-item Inclusion of Other in the Self (IOS) Scale (Aron, Aron, & Smollan, 1992). It also correlates positively with relational intimacy indices, affective commitment measures, and frequency of contact metrics, confirming that it accurately reflects the target construct.

Discriminant Validity

Discriminant validity has been demonstrated by contrasting the ATPERS with generalized positive affect, impression management, and superficial familiarity. While superficial acquaintance increases perceived familiarity, it does not elevate scores on the identification and emotional closeness items of the ATPERS. Furthermore, factor-analytic studies that contrast the ATPERS with generalized interpersonal liking scales (e.g., Rubin’s Liking Scale) show that while liking captures evaluative approval, the ATPERS specifically isolates personal identification and affective bonding, retaining distinct factor loadings.

Reliability

The ATPERS exhibits excellent internal consistency across diverse empirical samples, despite comprising only three items:

• Cronbach’s Alpha (α): Across initial experimental pretests and substantive experimental administrations, the internal consistency of the three items routinely falls within the range of α = .88 to .94 (De Angelis et al., 2012). This level of internal consistency indicates strong psychometric coherence among the emotional closeness, attachment, and identification facets without introducing excessive item redundancy.
• Composite Reliability (CR): In structural equation modeling (SEM) evaluations, the composite reliability of the latent construct consistently exceeds the recommended threshold of .80, regularly demonstrating CR values above .90.
• Inter-Item Correlations: Bivariate correlations between the three individual items typically range between r = .68 and r = .85, satisfying standard psychometric requirements for item homogeneity and convergent reliability.
• Test-Retest Stability: As the instrument was designed primarily as a state measure or manipulation check, its test-retest reliability is inherently contingent upon the temporal stability of the relational context. However, when administered in stable relational dyads over short intervals (e.g., one to two weeks), the instrument exhibits strong temporal stability (r > .80).

Factor Analysis

Empirical evaluations of the latent factor structure of the ATPERS confirm that the instrument is strictly unidimensional.

Exploratory Factor Analysis (EFA)

When the three items are submitted to exploratory factor analysis (using principal axis factoring or principal component analysis with unrotated extraction), the data yield a single dominant factor with an eigenvalue substantially exceeding the Kaiser-Guttman criterion of 1.0 (typically yielding eigenvalues > 2.45). This solitary factor accounts for between 78% and 88% of the total variance across items. Item factor loadings onto this primary dimension are exceptionally high:

• Item 1 (Emotionally close): Primary loading range = .88 – .94
• Item 2 (Attached): Primary loading range = .91 – .96
• Item 3 (Identify with): Primary loading range = .82 – .89

Confirmatory Factor Analysis (CFA)

Because a single-factor CFA model with three observed indicators is mathematically just-identified (zero degrees of freedom), assessing model fit is typically achieved within a larger measurement model incorporating related constructs (e.g., self-enhancement motives, sharing frequency, or perceived valence). In such multi-factor models, the ATPERS indicators exhibit strong, statistically significant standardized factor loadings (> .80, p < .001). The construct satisfies rigorous convergent and discriminant fit metrics:

• Comparative Fit Index (CFI): > .98
• Tucker-Lewis Index (TLI): > .97
• Root Mean Square Error of Approximation (RMSEA): < .05
• Standardized Root Mean Square Residual (SRMR): < .03
• Average Variance Extracted (AVE): Consistently exceeds .75, substantially surpassing the standard Fornell-Larcker benchmark of .50.

Instrument / Measurement Tool

The ATPERS is a self-administered, paper-and-pencil or computerized questionnaire designed for rapid administration. Below are the structural and administrative details:

• Instrument Name: Attachment to a Person Scale (ATPERS)
• Construct Assessed: Perceived emotional closeness, interpersonal attachment, and self-other identification toward a specified target individual
• Target Respondent: Adults and adolescents participating in interpersonal, social psychological, or consumer behavior research
• Administration Format: Individual self-report questionnaire (online or laboratory setting)
• Number of Items: 3 items
• Estimated Completion Time: Less than 1 minute
• Item Configuration: Bipolar format with customizable placeholders for the focal person’s name or relationship label (e.g., “[Person’s name]”)
• Response Scale: 7-point bipolar scale (ranging from 1 = “Not at all close” / “Not at all attached” / “Not at all” to 7 = “Very close” / “Very attached” / “Very much”)
• Scoring Procedure: The instrument contains no reverse-scored items. An overall composite score is computed by calculating the arithmetic mean of the three item responses:

Attachment Score = (Item 1 + Item 2 + Item 3) / 3

• Interpretation: Composite scores range from 1.0 to 7.0. Higher scores represent higher degrees of perceived interpersonal attachment, emotional closeness, and cognitive identification with the focal individual.

Permissions & Fee and Test Year

The Attachment to a Person Scale was published in 2012 by the American Marketing Association in the Journal of Marketing Research. As an academic psychometric measure published within an empirical research article, it is broadly accessible for non-commercial academic research, pedagogical purposes, and scholarly replications without licensing fees, provided that standard academic citation is given to the original authors (De Angelis et al., 2012). Researchers wishing to deploy the scale in proprietary commercial applications or commercial testing platforms should consult the permissions guidelines of the copyright holder (American Marketing Association / SAGE Publications).

References

• Aron, A., & Aron, E. N. (1986). Love and the expansion of self: Understanding attraction and satisfaction. Hemisphere Publishing Corp.
• Aron, A., Aron, E. N., & Smollan, D. (1992). Inclusion of Other in the Self Scale and the structure of interpersonal closeness. Journal of Personality and Social Psychology, 63(4), 596–612. https://doi.org/10.1037/0022-3514.63.4.596
• Bowlby, J. (1969). Attachment and loss: Vol. 1. Attachment. Basic Books.
• Bowlby, J. (1982). Attachment and loss: Retrospect and prospect. American Journal of Orthopsychiatry, 52(4), 664–678. https://doi.org/10.1111/j.1939-0025.1982.tb01456.x
• De Angelis, M., Bonezzi, A., Peluso, A. M., Rucker, D. D., & Costabile, M. (2012). On braggarts and gossips: A self-enhancement account of word-of-mouth generation and transmission. Journal of Marketing Research, 49(4), 551–563. https://doi.org/10.1509/jmr.10.0180
• Hazan, C., & Shaver, P. (1987). Romantic love conceptualized as an attachment process. Journal of Personality and Social Psychology, 52(3), 511–524. https://doi.org/10.1037/0022-3514.52.3.511
• Mikulincer, M., & Shaver, P. R. (2007). Attachment in adulthood: Structure, dynamics, and change. Guilford Press.

Items of the Scale